/*
2. Write a program that reads the radius r of a circle and prints its perimeter and area.
*/
using System;

class circlePerimeterArea
{
    static void Main()
    {
        Console.Write("Enter the radius r of a circle: ");
        double circleRadius = double.Parse(Console.ReadLine());

        double circlePerimeter = 2.0f * Math.PI * circleRadius;
        double circleArea = Math.PI * circleRadius * circleRadius;
        Console.WriteLine("Circle with radius {0} has a perimeter {1} and area {2}", circleRadius, circlePerimeter, circleArea);
    }
}